As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE CREW REPORTED SYSTEM B HYDRAULIC PUMP FAILURE. THE CREW MADE AN AIR-TURN-BACK, AFTER CONSULTING WITH MECHANIC. THE AC WAS INSPECTED BY MECHANIC WHO CHECKED THE SYSTEM AND REPLACED THE B SIDE HYDRAULIC AC MOTOR PUMP. THE AC WAS RETURNED TO SERVICE WITH NO FURTHER DEFECTS. (K)